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15A NCAC 02D .0968 AUTOMOBILE AND LIGHT DUTY TRUCK ASSEMBLY COATINGS
(a) For the purpose of this Rule, the following definitions apply:
(1)
"Automobile" means a motor vehicle designed to carry up to eight passengers, excluding vans, sport
utility vehicles, and motor vehicles designed primarily to transport light loads of property.
(2)
"Automobile Topcoat Protocol" means Protocol For Determining The Daily Volatile Organic
Compound Emission Rate Of Automobile and Light-duty Truck Topcoat Operations (EPA-450/3-88018).
(3)
"Electrodeposition" means a process of applying a protective, corrosion-resistantwaterborne primer on
exterior and interior surfaces that provides coverage of recessed areas. It is a dip coating method that
uses an electrical field to apply or deposit the conductive coating onto the part. The object being
painted acts as an electrode that is oppositely charged from the particles of paint in the dip tank.
(4)
"Final repair" means the operations performed and coating(s) applied to completely assembled motor
vehicles or to parts that are not yet on a completely assembled vehicle to correct damage or
imperfections in the coating.
(5)
"Light-duty truck" means vans, sport utility vehicles, and motor vehicles designed primarily to
transport light loads of property with gross vehicle weight rating of 8,500 pounds or less.
(6)
"Primer-surfacer" means an intermediate protective coating applied over the electrodeposition primer
(EDP) and under the topcoat. Primer-surfacer provides adhesion, protection, and appearance
properties to the total finish.
(7)
"Solids turnover ratio (RT)" means the ratio of total volume of coating solids that is added to the EDP
system in a calendar month divided by the total volume design capacity of the EDP system.
(b) This Rule applies to automobile and light-duty truck assembly coating operations and related cleaning activities
whose emissions of volatile organic compounds exceed the threshold established in Paragraph (b) of Rule .0902 of this
Section at:
(1)
automobile or light-duty assembly plants during the vehicle assembly processes with the following
primary coating product applications:
(A)
new automobile or new light-duty truck bodies, or body parts for new automobiles or new
light-duty trucks;
(B)
other parts that are coated along with these bodies or body parts; or
(C)
additional coatings which include glass bonding primer, adhesives, cavity wax, sealer,
deadener, gasket/gasket sealing material, underbody coating, trunk interior coating, bedliner,
weatherstrip adhesive, and lubricating waxes/compounds; and
(2)
facilities that perform coating operations on a contractual basis other than plastic or composites
molding facilities.
(c) This Rule does not apply to:
(1)
aerosol coatings of automobile and light-truck assembly coatings;
(2)
coatings that are applied to other parts intended for use in new automobiles or new light-duty trucks
(e.g., application of spray primer, color and clear coat to fascia or bumpers) on coating lines that are
not related to the vehicle assembly process at automobile or light-duty assembly plants. They are
covered by Rules .0964, and .0967 of this Section; and
(3)
aftermarket repair or replacement parts for automobiles or light-duty trucks that are covered by Rules
.0964, and .0967 of this Section.
(d) With the exception of materials supplied in containers with a net volume of 16 ounces or less, or a net weight of one
pound or less, emissions of volatile organic compounds before control for:
(1)
automobile and light-duty truck assembly coatings shall not exceed limits established in Table 1.
Table 1. Volatile Organic Compounds emission limits for automobile and light-duty truck assembly coatings.
Assembly Coating Process
Volatile Organic Compounds Emission Limit
Electrodeposition primer (EDP)
When solids
When
When
operations (including application area,
turnover ratio
0.040≤ RT <0.160;
RT < 0.040;
spray/rinse stations, and curing oven)
(RT) ≥ 0.16;
0.7lb/gal
0.0840.160-R x 8.34
No VOC
coatings solids
lb/gal coating solids
emission
applied.
applied.
limit.
Primer-surfacer operations(including
application area, flash-off area, and
oven)
Topcoat operations (including
application area, flash-off area, and
oven)
Final repair operations
Combined primer-surfacer and topcoat
operations
(2)
12.0 lb VOC/gal deposited solids on a daily weighted average
basis as determined by following the procedures in the revised
Automobile Topcoat Protocol
12.0 lb VOC/gal deposited solids on a daily weighted average
basis as determined by following the procedures in the revised
Automobile Topcoat Protocol
4.8 lb VOC/gallon of coating less water and less exempt
solvents on a daily weighted average basis or as an occurrence
weighted average.
12.0 lb VOC/gal deposited solids on a daily weighted average
basis as determined by following the procedures in the revised
Automobile Topcoat Protocol
materials used at automobile and light-duty truck assembly coatings facilities shall not exceed limits
established in Table 2.
Table 2. Volatile Organic Compounds emission limits for miscellaneous materials used at automobile and light-duty
Material
VOC Emission Limit
Automobile and light-duty truck glass bonding primer
900
Automobile and light-duty truck adhesive
250
Automobile and light-duty truck cavity wax
650
Automobile and light-duty truck sealer
650
Automobile and light-duty truck deadener
650
Automobile and light-duty truck gasket/gasket sealing material
200
Automobile and light-duty truck underbody coating
650
Automobile and light-duty truck trunk interior coating
650
Automobile and light-duty truck bedliner
200
Automobile and light-duty truck weatherstrip adhesive
750
Automobile and light-duty truck lubricating wax/compound
700
(e) EPA Method 24 or 25A (40 CFR Part 60, Appendix A-7) shall be used to determine the volatile organic compounds
content of coatings, other than reactive adhesives used at automobile and light-duty truck coating facilities unless the
facility maintains records to document the volatile organic compounds content of coating materials from the
manufacturer.
(f) The emission limits established in Paragraph (d) of this Rule may be achieved with a combination of higher-solid
solvent-borne coatings, efficient application equipment and bake oven exhaust control.
(g) The owner or operator of any facility subject to this Rule shall comply with the Rules .0903 and .0958 of this
Section.
History Note:
Authority G.S. 143-215.3(a)(1); 143-215.107(a)(5);
Eff. September 1, 2010.